Machine for making horseshoes



(No M d 3 Sheets-Sheet 1.

- J. ROBERTS.

MACHINE FOR-MAKING HURSESHOES.

n Model.)

ROBE 3 shet sheet 2- wi/tmww (No Model.) a Sheets-Sheet 3.

J. ROBERTS. MACHINE FOR MAKINGAHOB-SESHOES.

- No. 501,298. I Patented Ju1y 1l,1893.

WITNESSES: I I IINVENTBR MT M;

Nrrnn STATES JACOB ROBERTS, OF OATASAUQUA, PENNSYLVANIA.

MA CHINE FOR MAKING HORSESHOES.

SPECIFICATION forming part of Letters Patent No. 501,298, dated July 11, 1893.

7 Application filed March 19, 1391. Serial No. 385,595 (No 'model.)

To all whom it may concern.-

Be it known thatl, JACOB ROBERTS, of Catasauqua, Lehigh county, and State of Pennsylvania, have invented a certain new and useful Improvement in Machines for Making Horseshoes, of which the following is a specification.

I will describe a machine embodying my improvement and then point out the novel features in a claim.

In the accompanying drawings, Figure 1 is a back view of a machine embodying my improvement. Fig. 2 is a central vertical section taken parallel with the side. Fig. 3 is a vertical section of certain parts including the dies. Fig. 4: is a view like Fig. 3, but representing parts in different positions. Fig. 5 is a top view of the bottom die. Fig. 6 is a side view of the same die. Fig. 7 is a section of this die at the plane of the dotted line a: m Fig. 5. Fig. 8 is a perspective view of a horseshoe blank such as is to be submitted to the action of the machine. Fig. 9 is a horizontal section at the line 1; '0 Fig.8. Fig. 10 is a horizontal section at the line to w Fig. 8. Fig. 11 is a perspective of the finished horseshoe. Fig. 12 is a horizontal section at the line a a Fig. 11. Fig. 13 is a horizontal section at the line i t Fig. 11.

Similar letters of reference designate corresponding parts in all the figures.

A, B, designate two dies. A is the lower die and B the upper die. As here shown, the lower die A is fastened by means of a set screw a in a recess formed in a reciprocating table A. This table is supported beneath the die A by means of a shaft C. The shaft 0 is free to derive rotary motion from the reciprocating movement of the table. It derives no rotary motion except from the table. The journals of this shaft are sustained in bearings c that are fitted to housings d in side frames D. The side frames D are erected upon a base piece E, and preferably united nected to the rear end portion of the table A and at the other end connected to crank pins h 7L2 carried bya shaft H. The crank pin h extends from a crank arm h affixed to the shaft H. The crank pin h is'affixed to a gear wheel I that is affixed to the shaft H. Both crank pins are in line and travel in unison. As the shaft H rotates,it will reciprocate the table and consequently the lower die A back and forth. The shaft H is journaled in bearings 71, fitted to the housings of the side frames D. The lower sections of these bearings are supported by the upper sections of the bearings 0 wherein the shaft 0 is journaled, springs 8 being introduced between the top sections of the bearings c and the lower sections of the bearings 71. Screws J engaging with tapped holes or nuts in the upper ends of the side frames D and contacting with the top sections of the bearings h serve to adjust the latter vertically so as to vary the position of the shaft H relatively to the shaft 0 and table A. The screws J when adjusted may be retained in position by inserting in plates P fastenedto the top of the side frames D, pins P, which will project across cranks formed on or attached to the upper ends of said screws. The rotary die 13, as here shown, is fitted in a holder 1) carried by the shaft H, and, as here shown, formed integral with the latter. A set screw b serves to fasten this die in said holder. As the shaft rotates, the die B is revolved, and its revolution is so timed relatively to the reciprocation of the table A that this die will be opposite the lower die A, and with it will press a horseshoe inserted between them. Preferably the shaft 0 will be arranged with its axis a little in front of the vertical plane in which the axis of the shaft H is located. When so arranged, it will be more certain to prevent the table from tilting. The outer surface of the die Bis rounded and may be made concentric with the shaft H.

The lower die A is constructed to shape the upper surface or top of a horse shoe. It has a raised central portion a of rounded or convex form, and adjacent to this portion is provided with two clips a a whose opposite surfaces are arranged at the angle which the heel portions of the shoe are to have and converge upwardly, so that the space between them is not only narrower toward the back of the die, or, in other words, toward that part of the die which is the nearer to the back of the machine, but is also narrower at the upper part of the clips than at the bottom. The main top surface of the die is inclined downwardly toward that portion where the heel of the shoe is formed, as may be best understood by reference to Fig. 6. The pressing surface of the upper die B is smooth. Owing to the fact that the main top surface of the lower die A is inclined toward the heel or rear, the horseshoes when pressed by the dies will be thinner at the toe than at the heel. The crank pins h 72 are arranged at such a distance from the axis of the shaft H that the lower die A will have a slower surface speed than the upper die B. The lower die moves in the direction indicated by the arrow which is adjacent to the shaft H in Fig. 2, and hence the pressing of the horseshoe will begin at the heel and continuetoward thetoe. Theshoeembraces the central raised portion a of thelower die A, and, consequently, as the pressing action of the upper die progresses from the heel of a shoe toward the toe, the metal cannot be forced inward but is necessarily outward or toward the outer circumference of the shoe. By pressing in the described direction, and owing to the greater surface speed of the upper die as compared with that of the lower die, I avoid carrying the wall of the shoe over at the toe, so as to close the crease or groove which is formed for the reception of the nail heads, and so giving too much under-cut, as it is generally termed, an evil resulting very generally from pressing from toe to heel. The greater surface speed of the upper die tends to move the metal rearward as the pressing progresses, although the pressing progresses from the heel to the toe of the shoe, and it is due to this that the metal is not carried forward to increase the under-cut.

K designates ejectors for detaching each horseshoe, after the pressing operation, from the lower die A. Two such ejectors will be used. Only one is shown in Fig. 1 because it is desired to represent the dies. Each is supported upon an arm is extending from one of the side frames D toward the other of these side frames, and consists of a rod fitted to slide in bearings k with which said arm 70 is provided, and impelled toward the dies A, B, by means of a spring surrounding it and impinging at one end against one of the bearings k and at the other end against a collar k which is fastened to the rod. When the lower die moves rearwardly the extremities of the heel of the horseshoe will strike the ejectors and be thus disengaged from the die. As the ejectors operate with a yielding action, they will do their work without any injury. The wheel I engages with a wheel L affixed to a driving shaft M to which motion may be transmitted by a belt. Fixed and idler pulleys N N are mounted upon the shaft M and the latter is also provided with a balance wheel 0.

What I claim as my invention, and desire to secure by Letters Patent, is-

In a machine for pressing horseshoes, the combination with driving mechanism, of a leciprocating table, a die thereon, having clips a a a shaft, a die rotated by said shaft and coacting with the reciprocating die to press a shoe from heel to toe, cranks carried by the shaft and connections between the cranks and table, the crank pins being arranged at such a distance from the axis of the shaft that the reciprocating die will have a slower surface speed than the upper die, substantially as specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JACOB ROBERTS.

Witnesses:

V. H. ROBERTS, AUSTIN A. GLIoK. 

